CN105177435A - Thin hot rolled steel strip for cutting tools and manufacturing method of thin hot rolled steel strip - Google Patents
Thin hot rolled steel strip for cutting tools and manufacturing method of thin hot rolled steel strip Download PDFInfo
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- CN105177435A CN105177435A CN201510496478.2A CN201510496478A CN105177435A CN 105177435 A CN105177435 A CN 105177435A CN 201510496478 A CN201510496478 A CN 201510496478A CN 105177435 A CN105177435 A CN 105177435A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 238000005520 cutting process Methods 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 title description 7
- 239000000126 substance Substances 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 15
- 230000002146 bilateral effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 238000000137 annealing Methods 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 238000010583 slow cooling Methods 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000010923 batch production Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000013475 authorization Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005204 segregation Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a thin hot rolled steel strip for cutting tools. Chemical components contained in steel include, by mass, 0.85-1.00% of C, 1.00-1.60% of Si, 0.20-0.70% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.008% of N, 0.90-1.30% of Cr, 0.020-0.050% of Als, and the balance Fe and inevitable impurities. The thickness of the steel strip is 1.2-3.2 mm, the hardness of the steel strip is less than or equal to 201 HV, and the level of a banded structure is below the level 1.0. The proportion of the thickness of a bilateral decarburized layer accounting for the thickness of strip steel is less than 1.5%, and the unevenness of the steel strip is less than 16 mm/m. The thin hot rolled steel strip for the cutting tools is small in thickness and low in hardness, the level of a banded structure is below the level 1.0, the proportion of the thickness of the bilateral decarburized layer accounting for the thickness of the strip steel is small, and the unevenness of the steel strip is small; the thin hot rolled steel strip has good cold machining performance, is good in surface quality and can replace an existing cold-rolled product.
Description
Technical field
The present invention relates to hot rolled strip Application Areas, refer to a kind of cutlery Thin Specs hot rolled strip and manufacture method thereof particularly.
Background technology
Cutlery steel is widely used in the cutting cutlery processing of metal, stone material and timber, cutlery Working environment and complete processing require that cutting cutlery steel has higher hardness, preferably wear resistance and higher resistance to tempering, simultaneously also higher to the requirement of Raw material processing performance and planeness.Current cutlery steel generally adopts cold rolling+annealed band to be raw material, but adopts the cost of cold rolled annealed raw material higher, so also consider at present to adopt hot rolling raw material to make cutting cutlery.
But, cut the C of general employing more than 0.80 in the design of cutlery composition of steel, and add higher alloying elements cr, Mn, V, Si etc., in its making processes, resistance to deformation is comparatively large, adopts traditional hot continuous rolling flow process to be difficult to the thin slab product of direct production below thickness 3.0mm.In addition, directly adopt hot rolling material to carry out adding man-hour, because the hardness of hot rolling material itself is high, therefore in following process process, easily occur stamping-out problems of crack.
In recent years, thin plate blank continuously casting and continuously rolling technology is developed rapidly, and also produces the product of the higher and thinner thickness of carbon content on this basis.
Authorization Notice No. is that the Chinese invention patent of CN101773930B discloses a kind of method of producing 65Mn hot-rolled steel sheet, the chemical composition that refining process carries out the molten steel after Alloying Treatment is: C:0.62 ~ 0.70%, Si:0.17 ~ 0.37%, Mn:0.90 ~ 1.20%, P≤0.035%, S≤0.035%, Cr≤0.25%, Ni≤0.25%, all the other are Fe and inevitable impurity; Authorization Notice No. is that the Chinese invention patent of CN101792883B discloses a kind of method of producing 8CrV2 hot-rolled steel sheet, the chemical composition of molten steel is: C:0.70 ~ 0.80%, Si:0.20 ~ 0.45%, Mn:0.60 ~ 0.90%, P≤0.025%, S≤0.025%, Cr:0.30 ~ 0.60%, V:0.02 ~ 0.08%.Authorization Notice No. is that the Chinese invention patent of CN101745536B discloses a kind of method of producing SKS51 hot rolled steel sheet, chemical composition (by weight, %): C:0.75 ~ 0.85, Si≤0.30, Mn≤0.50, P≤0.030, S≤0.030, Cr:0.20 ~ 0.50, Ni:1.3 ~ 2.0, all the other are Fe and inevitable residual impurity.Authorization Notice No. is that the Chinese invention patent of CN101745536B discloses a kind of method of producing SKS51 hot rolled steel sheet, chemical composition (by weight, %): C:0.75 ~ 0.85, Si≤0.30, Mn≤0.50, P≤0.030, S≤0.030, Cr:0.20 ~ 0.50, Ni:1.3 ~ 2.0, all the other are Fe and inevitable residual impurity; Authorization Notice No. is that the Chinese invention patent of CN101745535B discloses a kind of method of producing 75Cr1 hot-rolled steel sheet, the chemical composition of molten steel is (by weight, %): C:0.70 ~ 0.80, Si:0.20 ~ 0.45, Mn:0.60 ~ 0.90, P≤0.025, S≤0.025, Cr:0.30 ~ 0.60, V:0.02 ~ 0.08.For above-mentioned patent, its main production comprises superheating temperature 30 ~ 45 DEG C, strand charging temperature 900 ~ 1050 DEG C, finishing temperature 850 ~ 950 DEG C, coiling temperature 550 ~ 630 DEG C.But foregoing invention for steel grades: C content is substantially below 0.85, and Si is below 0.40, and alloy content is lower, and the thickness of product is generally at more than 4.0mm.
Therefore, there is provided a kind of product thickness thin, hardness is low, banded structure is less than 1.0 grades, the ratio that bilateral practical decarburized depth accounts for belt steel thickness is little, and the roughness of product is little, has good cold-forming property, surface quality is good, and the cutlery Thin Specs hot rolled strip of alternative current cold-rolled products and manufacture method thereof seem very necessary.
Summary of the invention
The object of the invention is to the weak point overcoming above-mentioned existing background technology, a kind of cutlery Thin Specs hot rolled strip and manufacture method thereof are provided.
The object of the invention is to be reached by following measure: a kind of cutlery Thin Specs hot rolled strip, in steel, chemical composition and mass percent are: C:0.85 ~ 1.00%, Si:1.00 ~ 1.60%, Mn:0.20 ~ 0.70%, P≤0.015%, S≤0.010%, N≤0.008%, Cr:0.90 ~ 1.30%, Als:0.020 ~ 0.050%, all the other are Fe and inevitable impurity; Product thickness is 1.2 ~ 3.2mm, product hardness≤201HV, and banded structure is less than 1.0 grades, and the ratio that bilateral practical decarburized depth accounts for belt steel thickness is less than 1.5%, and the roughness of product is less than 16mm/m.
Preferably, in steel, chemical composition and mass percent are: C:0.85 ~ 0.95%, Si:1.25 ~ 1.50%, Mn:0.45 ~ 0.58%, P≤0.013%, S≤0.010%, N≤0.008%, Cr:0.90 ~ 1.28%, Als:0.020 ~ 0.045%, all the other are Fe and inevitable impurity.
Further, in steel, chemical composition and mass percent are: C:0.94%, Si:1.50%, Mn:0.50%, P≤0.013%, S≤0.010%, N≤0.008%, Cr:1.28%, Als:0.045%, and all the other are Fe and inevitable impurity.
Main chemical elements and the percentage composition effect in the present invention thereof of the present invention's selection are as follows:
C: carbon mainly works the hardness and the hardening capacity that improve steel in steel, and carbon content is too low, and after heat treatment hardness is too low, and steel is too soft.Carbon content is too high, and steel hardness is too high, and the course of processing easily occurs problems of crack, and processing characteristics is poor.Therefore carbon content is 0.85 ~ 1.00%, and preferably, C content is chosen as 0.85% ~ 0.95%.
Si:Si rises and improves the anti-relaxation ability of steel and resistance to tempering in steel, also plays the effect improving hardenability of steel.Si content is too low, and the anti-relaxation ability of steel is too little, and minimum Si content is 1.00%, Si too high levels, and the fragility of steel increases, and too high Si also easily causes the C greying in steel, and therefore most high Si content is 1.60%.
Mn:Mn works the hardness and hardening capacity that improve steel in steel, and the S in steel is combined and forms MnS, improves the toughness of steel.Mn content is too low, and it is too weak to improve hardenability of steel effect, and therefore minimum Mn content is that 0.20%, Mn too high levels easily causes central segregation of slab in casting process, reduces the use properties of material, and therefore most high Mn content is 0.70%.
P:P is the impurity element in steel, is easy at Grain Boundary Segregation, affects the toughness of product, and therefore its content is more low better.According to working control level, should control below 0.015%.
S:S is the impurity element in steel, easily produces segregation at crystal boundary, reduces the toughness of steel, fully should remove, should ensure that its value is lower than 0.010% during steel-making.
N:N is the impurity element in steel, reduces the toughness of steel, and be easy to Al, Ti and form AlN and TiN, too high levels, easily form thick TiN, therefore reduce its content, its value should lower than 0.008% as far as possible.
Cr:Cr can improve the hardening capacity of steel, be conducive to the hardness and the wear resistance that improve steel, stable carbide is formed in steel, improve the anti-temper resistance of steel, in the present invention, Schwellenwert is 0.90%, but Cr too high levels easily causes steel much higher hard, toughness declines, and therefore maximum is 1.30%.
Al:Al is combined with O in steel, mainly plays the effect of deoxidation, and therefore minimum content is that 0.020%, Al too high levels easily forms continuous casting and produces difficulty, and therefore most high-content controls is 0.050%.
Steel of the present invention is except containing except above-mentioned chemical composition, and all the other are Fe and inevitable impurity.
The preparation method of above-mentioned cutlery Thin Specs hot rolled strip, comprises the steps:
1) smelting, refining, vacuum-treat and continuous casting: during continuous-casting steel pouring, the superheating temperature of molten steel controls to be 15 ~ 35 DEG C, and it is 50 ~ 70mm that thickness of strand controls;
2) heat: heating steps 2) strand of gained, it is 950 ~ 1100 DEG C that strand charging temperature controls, it is 1200 DEG C ~ 1250 DEG C that tapping temperature controls, and it is 30 ~ 120min that strand time inside furnace controls, and heating fuel used air-fuel ration control is 1.00 ~ 1.25;
3) controlled rolling: to step 3) in the strand of gained carry out roughing and finish rolling, the first passage of finish rolling and the draft of the second passage all control 35 ~ 60%, finish rolling end percentage pass reduction≤15%, and finishing temperature control is 900 ~ 960 DEG C;
4) control cold: to step 4) in the steel plate of gained carry out control deepfreeze, adopt section cooling, cooling termination temperature control is 610 ~ 650 DEG C, rate of cooling >=30 DEG C/s;
5) batch: to step 4) in the steel plate of gained batch process, oiler temperature control is 620 DEG C ~ 680 DEG C;
6) slow cooling: to step 5) in the coil of strip of gained carry out slow cooling process, slow cooling time controling is 48 ~ 72h;
7) anneal: to step 6) in the coil of strip of gained carry out cycle annealing process, it is 660 ~ 850 DEG C that annealing temperature controls, and it is 6 ~ 20h that annealing time controls;
8) smooth: to step 6) in the coil of strip of gained carry out smooth process, namely obtain cutlery Thin Specs hot rolled strip.
Preferably, described step 1) in, the superheating temperature of molten steel controls to be 15 ~ 25 DEG C, and it is 52 ~ 60mm that thickness of strand controls.
Further, described step 2) in, it is 30 ~ 60min that strand time inside furnace controls.
Again further, described step 3) in, finishing temperature control is 910 ~ 930 DEG C.
Again further, described step 4) in, it is 30 ~ 42 DEG C/s that rate of cooling controls.
Further, described step 5) in, oiler temperature control is 630 ~ 670 DEG C.
Again further, described step 7) in, it is 670 ~ 710 DEG C that annealing temperature controls, and it is 12 ~ 16h that annealing time controls.
The invention has the advantages that:
One, it is 1.2 ~ 3.2mm that Steel Properties index of the present invention meets product thickness, product hardness≤201HV, and banded structure is less than 1.0 grades, and the ratio that bilateral practical decarburized depth accounts for belt steel thickness is less than 1.5%, and the roughness of product is less than 16mm/m;
They are two years old, the present invention by control steel chemical composition, control coiling temperature and annealing temperature, the hot rolling technology of reasonable and laminar flow cooling technology etc., make hot rolling reach the structure property suitable with existing cold-rolled products and plate shape size, and Absorbable organic halogens is produced.
Embodiment
Describe performance of the present invention in detail below in conjunction with embodiment, but they do not form limitation of the invention, only for example.Simultaneously by illustrating that advantage of the present invention will become clearly and easy understand.
Table 1 is embodiment 1 ~ 7 is chemical composition and weight percent in cutlery Thin Specs hot rolled strip, and comparative example 1 ~ 3 is chemical composition and weight percent in compared steel, and all the other are Fe and inevitable impurity.
The chemical composition of table 1 various embodiments of the present invention and comparative example and weight percent (wt%)
The slab described chemical composition obtained after smelting, refining, vacuum-treat and continuous casting is cold through heating, controlled rolling, control, batch, slow cooling, annealing and smooth after namely obtain cutlery Thin Specs hot rolled strip.Concrete main technologic parameters is as following table:
The main technologic parameters list (one) of table 2 various embodiments of the present invention
The main technologic parameters list (two) of table 3 various embodiments of the present invention
The performance perameter of above-described embodiment and comparative example is as shown in the table:
The results of property list of table 4 various embodiments of the present invention and comparative example
As can be seen from Table 4: relative to comparative example 1 ~ 3, the embodiment of the present invention 1 ~ 7 product steel mechanical property is good, product thickness is 1.2 ~ 3.2mm, product hardness≤201HV, banded structure is less than 1.0 grades, the ratio that bilateral practical decarburized depth accounts for belt steel thickness is less than 1.5%, and the roughness of product is less than 16mm/m, does not ftracture.This explanation, in preparation technology, during continuous-casting steel pouring, the superheating temperature of molten steel controls to be 15 ~ 35 DEG C, it is 950 ~ 1100 DEG C that strand charging temperature controls, it is 1200 DEG C ~ 1250 DEG C that tapping temperature controls, and it is 30 ~ 120min that strand time inside furnace controls, and heating fuel used air-fuel ration control is 1.00 ~ 1.25; First passage of finish rolling and the draft of the second passage all control 35 ~ 60%, finish rolling end percentage pass reduction≤15%, and finishing temperature control is 900 ~ 960 DEG C; It is 610 ~ 650 DEG C that cooling termination temperature controls, rate of cooling >=30 DEG C/s; Oiler temperature control is 620 DEG C ~ 680 DEG C; Slow cooling time controling is 48 ~ 72h; It is 660 ~ 850 DEG C that annealing temperature controls, and when annealing time control is 6 ~ 20h, product Steel Properties is good.
Other is prior art without the part described in detail.
Claims (10)
1. a cutlery Thin Specs hot rolled strip, it is characterized in that: in steel, chemical composition and mass percent are: C:0.85 ~ 1.00%, Si:1.00 ~ 1.60%, Mn:0.20 ~ 0.70%, P≤0.015%, S≤0.010%, N≤0.008%, Cr:0.90 ~ 1.30%, Als:0.020 ~ 0.050%, all the other are Fe and inevitable impurity; Product thickness is 1.2 ~ 3.2mm, product hardness≤201HV, and banded structure is less than 1.0 grades, and the ratio that bilateral practical decarburized depth accounts for belt steel thickness is less than 1.5%, and the roughness of product is less than 16mm/m.
2. cutlery Thin Specs hot rolled strip according to claim 1, it is characterized in that: in steel, chemical composition and mass percent are: C:0.85 ~ 0.95%, Si:1.25 ~ 1.50%, Mn:0.45 ~ 0.58%, P≤0.013%, S≤0.010%, N≤0.008%, Cr:0.90 ~ 1.28%, Als:0.020 ~ 0.045%, all the other are Fe and inevitable impurity.
3. cutlery Thin Specs hot rolled strip according to claim 1, it is characterized in that: in steel, chemical composition and mass percent are: C:0.94%, Si:1.50%, Mn:0.50%, P≤0.013%, S≤0.010%, N≤0.008%, Cr:1.28%, Als:0.045%, all the other are Fe and inevitable impurity.
4. a preparation method for cutlery Thin Specs hot rolled strip according to claim 1, is characterized in that: comprise the steps:
1) smelting, refining, vacuum-treat and continuous casting: during continuous-casting steel pouring, the superheating temperature of molten steel controls to be 15 ~ 35 DEG C, and it is 50 ~ 70mm that thickness of strand controls;
2) heat: heating steps 2) strand of gained, it is 950 ~ 1100 DEG C that strand charging temperature controls, it is 1200 DEG C ~ 1250 DEG C that tapping temperature controls, and it is 30 ~ 120min that strand time inside furnace controls, and heating fuel used air-fuel ration control is 1.00 ~ 1.25;
3) controlled rolling: to step 3) in the strand of gained carry out roughing and finish rolling, the first passage of finish rolling and the draft of the second passage all control 35 ~ 60%, finish rolling end percentage pass reduction≤15%, and finishing temperature control is 900 ~ 960 DEG C;
4) control cold: to step 4) in the steel plate of gained carry out control deepfreeze, adopt section cooling, cooling termination temperature control is 610 ~ 650 DEG C, rate of cooling >=30 DEG C/s;
5) batch: to step 4) in the steel plate of gained batch process, oiler temperature control is 620 DEG C ~ 680 DEG C;
6) slow cooling: to step 5) in the coil of strip of gained carry out slow cooling process, slow cooling time controling is 48 ~ 72h;
7) anneal: to step 6) in the coil of strip of gained carry out cycle annealing process, it is 660 ~ 850 DEG C that annealing temperature controls, and it is 6 ~ 20h that annealing time controls;
8) smooth: to step 6) in the coil of strip of gained carry out smooth process, namely obtain cutlery Thin Specs hot rolled strip.
5. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 1) in, the superheating temperature of molten steel controls to be 15 ~ 25 DEG C, and it is 52 ~ 60mm that thickness of strand controls.
6. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 2) in, it is 30 ~ 60min that strand time inside furnace controls.
7. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 3) in, finishing temperature control is 910 ~ 930 DEG C.
8. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 4) in, it is 30 ~ 42 DEG C/s that rate of cooling controls.
9. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 5) in, oiler temperature control is 630 ~ 670 DEG C.
10. the preparation method of cutlery Thin Specs hot rolled strip according to claim 4, is characterized in that: described step 7) in, it is 670 ~ 710 DEG C that annealing temperature controls, and it is 12 ~ 16h that annealing time controls.
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| CN201510496478.2A CN105177435B (en) | 2015-08-13 | 2015-08-13 | Thin hot rolled steel strip for cutting tools and manufacturing method of thin hot rolled steel strip |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591724A (en) * | 2016-12-15 | 2017-04-26 | 武汉钢铁股份有限公司 | Hot-rolled annealed steel plate for cold forming and production method thereof |
| CN106755866A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Method for reducing cold-rolled low-alloy high-strength steel strip-shaped structure |
| CN107641758A (en) * | 2017-09-18 | 2018-01-30 | 武汉钢铁有限公司 | The manufacture method of the excellent alloy tool steel of fatigue behaviour and its hot rolled plate |
| CN108425070A (en) * | 2018-05-22 | 2018-08-21 | 首钢集团有限公司 | A kind of 1000MPa grades of shock wave resistance steel plate and its manufacturing method |
| CN115572891A (en) * | 2021-06-21 | 2023-01-06 | 上海梅山钢铁股份有限公司 | Cold-rolled annealed steel strip with yield strength of 420MPa for art designing blade |
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| JPS60121255A (en) * | 1983-12-06 | 1985-06-28 | Daido Steel Co Ltd | Steel for cutting tool |
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| JPS60121255A (en) * | 1983-12-06 | 1985-06-28 | Daido Steel Co Ltd | Steel for cutting tool |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755866A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Method for reducing cold-rolled low-alloy high-strength steel strip-shaped structure |
| CN106591724A (en) * | 2016-12-15 | 2017-04-26 | 武汉钢铁股份有限公司 | Hot-rolled annealed steel plate for cold forming and production method thereof |
| CN107641758A (en) * | 2017-09-18 | 2018-01-30 | 武汉钢铁有限公司 | The manufacture method of the excellent alloy tool steel of fatigue behaviour and its hot rolled plate |
| CN107641758B (en) * | 2017-09-18 | 2019-07-09 | 武汉钢铁有限公司 | The manufacturing method of the excellent alloy tool steel of fatigue behaviour and its hot rolled plate |
| CN108425070A (en) * | 2018-05-22 | 2018-08-21 | 首钢集团有限公司 | A kind of 1000MPa grades of shock wave resistance steel plate and its manufacturing method |
| CN108425070B (en) * | 2018-05-22 | 2021-01-15 | 首钢集团有限公司 | 1000 MPa-level shock wave resistant steel plate and manufacturing method thereof |
| CN115572891A (en) * | 2021-06-21 | 2023-01-06 | 上海梅山钢铁股份有限公司 | Cold-rolled annealed steel strip with yield strength of 420MPa for art designing blade |
| CN115572891B (en) * | 2021-06-21 | 2023-09-05 | 上海梅山钢铁股份有限公司 | Cold-rolled annealed steel strip with yield strength of 420MPa for art knife blade |
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| Publication number | Publication date |
|---|---|
| CN105177435B (en) | 2017-04-12 |
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